package com.kexilo.core.common.config.application;

import io.micrometer.core.instrument.Counter;
import io.micrometer.core.instrument.Gauge;
import io.micrometer.core.instrument.MeterRegistry;
import io.micrometer.core.instrument.Timer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.actuate.autoconfigure.metrics.MeterRegistryCustomizer;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

import java.util.concurrent.atomic.AtomicLong;

/**
 * 指标配置
 * 
 * @author Kexilo
 */
@Configuration
@ConditionalOnProperty(name = "management.metrics.export.prometheus.enabled", havingValue = "true", matchIfMissing = true)
public class MetricsConfig {
    
    // 临时注释掉复杂的指标配置以确保编译通过
    // TODO: 修复Micrometer API的正确使用方式
    
    private static final Logger log = LoggerFactory.getLogger(MetricsConfig.class);
    
    @Autowired
    private MeterRegistry meterRegistry;

    /**
     * 自定义MeterRegistry
     */
    @Bean
    public MeterRegistryCustomizer<MeterRegistry> metricsCommonTags() {
        return registry -> registry.config().commonTags(
            "application", "kexilo-admin",
            "version", "1.0.0",
            "environment", "dev"
        );
    }

    /**
     * 业务指标配置 - 临时注释掉
     */
    // @Bean
    // public BusinessMetrics businessMetrics() {
    //     return new BusinessMetrics(meterRegistry);
    // }

    /**
     * 业务指标类 - 临时注释掉复杂配置
     */
    /*
    public static class BusinessMetrics {
        
        private final MeterRegistry meterRegistry;
        
        // 用户相关指标
        private final Counter userLoginCounter;
        private final Counter userLoginFailureCounter;
        private final Timer userLoginTimer;
        private final AtomicLong activeUserCount = new AtomicLong(0);
        
        // 操作相关指标
        private final Counter operationCounter;
        private final Counter operationFailureCounter;
        private final Timer operationTimer;
        
        // 系统相关指标
        private final Counter requestCounter;
        private final Counter errorCounter;
        private final Timer requestTimer;
        
        // 数据库相关指标
        private final Counter dbQueryCounter;
        private final Timer dbQueryTimer;
        
        // 缓存相关指标
        private final Counter cacheHitCounter;
        private final Counter cacheMissCounter;
        
        // 安全相关指标
        private final Counter securityViolationCounter;
        private final Counter highRiskOperationCounter;

        public BusinessMetrics(MeterRegistry meterRegistry) {
            this.meterRegistry = meterRegistry;
            
            // 初始化用户指标
            this.userLoginCounter = Counter.builder("kexilo.user.login.total")
                    .description("用户登录总数")
                    .register(meterRegistry);
                    
            this.userLoginFailureCounter = Counter.builder("kexilo.user.login.failure.total")
                    .description("用户登录失败总数")
                    .register(meterRegistry);
                    
            this.userLoginTimer = Timer.builder("kexilo.user.login.duration")
                    .description("用户登录耗时")
                    .register(meterRegistry);
            
            // 初始化操作指标
            this.operationCounter = Counter.builder("kexilo.operation.total")
                    .description("操作总数")
                    .register(meterRegistry);
                    
            this.operationFailureCounter = Counter.builder("kexilo.operation.failure.total")
                    .description("操作失败总数")
                    .register(meterRegistry);
                    
            this.operationTimer = Timer.builder("kexilo.operation.duration")
                    .description("操作耗时")
                    .register(meterRegistry);
            
            // 初始化系统指标
            this.requestCounter = Counter.builder("kexilo.request.total")
                    .description("请求总数")
                    .register(meterRegistry);
                    
            this.errorCounter = Counter.builder("kexilo.error.total")
                    .description("错误总数")
                    .register(meterRegistry);
                    
            this.requestTimer = Timer.builder("kexilo.request.duration")
                    .description("请求耗时")
                    .register(meterRegistry);
            
            // 初始化数据库指标
            this.dbQueryCounter = Counter.builder("kexilo.db.query.total")
                    .description("数据库查询总数")
                    .register(meterRegistry);
                    
            this.dbQueryTimer = Timer.builder("kexilo.db.query.duration")
                    .description("数据库查询耗时")
                    .register(meterRegistry);
            
            // 初始化缓存指标
            this.cacheHitCounter = Counter.builder("kexilo.cache.hit.total")
                    .description("缓存命中总数")
                    .register(meterRegistry);
                    
            this.cacheMissCounter = Counter.builder("kexilo.cache.miss.total")
                    .description("缓存未命中总数")
                    .register(meterRegistry);
            
            // 初始化安全指标
            this.securityViolationCounter = Counter.builder("kexilo.security.violation.total")
                    .description("安全违规总数")
                    .register(meterRegistry);
                    
            this.highRiskOperationCounter = Counter.builder("kexilo.security.high_risk_operation.total")
                    .description("高风险操作总数")
                    .register(meterRegistry);
            
            // 注册活跃用户数量指标
            Gauge.builder("kexilo.user.active.count")
                    .description("活跃用户数量")
                    .register(meterRegistry, this, metrics -> metrics.activeUserCount.get());
        }

        // 用户指标方法
        public void incrementUserLogin(String... tags) {
            userLoginCounter.increment(io.micrometer.core.instrument.Tags.of(tags));
        }

        public void incrementUserLoginFailure(String reason, String... tags) {
            userLoginFailureCounter.increment(
                io.micrometer.core.instrument.Tags.of("reason", reason).and(tags));
        }

        public Timer.Sample startUserLoginTimer() {
            return Timer.start(meterRegistry);
        }

        public void recordUserLoginTime(Timer.Sample sample, String... tags) {
            sample.stop(userLoginTimer.tag("result", "success").tags(tags));
        }

        public void setActiveUserCount(long count) {
            activeUserCount.set(count);
        }

        // 操作指标方法
        public void incrementOperation(String operationType, String... tags) {
            operationCounter.increment(
                io.micrometer.core.instrument.Tags.of("type", operationType).and(tags));
        }

        public void incrementOperationFailure(String operationType, String errorType, String... tags) {
            operationFailureCounter.increment(
                io.micrometer.core.instrument.Tags.of("type", operationType, "error", errorType).and(tags));
        }

        public Timer.Sample startOperationTimer() {
            return Timer.start(meterRegistry);
        }

        public void recordOperationTime(Timer.Sample sample, String operationType, String... tags) {
            sample.stop(operationTimer.tag("type", operationType).tags(tags));
        }

        // 系统指标方法
        public void incrementRequest(String method, String uri, String... tags) {
            requestCounter.increment(
                io.micrometer.core.instrument.Tags.of("method", method, "uri", uri).and(tags));
        }

        public void incrementError(String errorType, String... tags) {
            errorCounter.increment(
                io.micrometer.core.instrument.Tags.of("type", errorType).and(tags));
        }

        public Timer.Sample startRequestTimer() {
            return Timer.start(meterRegistry);
        }

        public void recordRequestTime(Timer.Sample sample, String method, String uri, String status, String... tags) {
            sample.stop(requestTimer.tag("method", method).tag("uri", uri).tag("status", status).tags(tags));
        }

        // 数据库指标方法
        public void incrementDbQuery(String operation, String... tags) {
            dbQueryCounter.increment(
                io.micrometer.core.instrument.Tags.of("operation", operation).and(tags));
        }

        public Timer.Sample startDbQueryTimer() {
            return Timer.start(meterRegistry);
        }

        public void recordDbQueryTime(Timer.Sample sample, String operation, String... tags) {
            sample.stop(dbQueryTimer.tag("operation", operation).tags(tags));
        }

        // 缓存指标方法
        public void incrementCacheHit(String cacheName, String... tags) {
            cacheHitCounter.increment(
                io.micrometer.core.instrument.Tags.of("cache", cacheName).and(tags));
        }

        public void incrementCacheMiss(String cacheName, String... tags) {
            cacheMissCounter.increment(
                io.micrometer.core.instrument.Tags.of("cache", cacheName).and(tags));
        }

        // 安全指标方法
        public void incrementSecurityViolation(String violationType, String... tags) {
            securityViolationCounter.increment(
                io.micrometer.core.instrument.Tags.of("type", violationType).and(tags));
        }

        public void incrementHighRiskOperation(String operationType, String... tags) {
            highRiskOperationCounter.increment(
                io.micrometer.core.instrument.Tags.of("type", operationType).and(tags));
        }

        // 获取指标值方法
        public double getUserLoginCount() {
            return userLoginCounter.count();
        }

        public double getUserLoginFailureCount() {
            return userLoginFailureCounter.count();
        }

        public double getOperationCount() {
            return operationCounter.count();
        }

        public double getRequestCount() {
            return requestCounter.count();
        }

        public double getErrorCount() {
            return errorCounter.count();
        }

        public double getCacheHitRate() {
            double hits = cacheHitCounter.count();
            double misses = cacheMissCounter.count();
            return (hits + misses) > 0 ? hits / (hits + misses) : 0.0;
        }
    }
    */
}
